Results 1 to 7 of 7

Thread: Electrical Troubleshooting Advice Needed

Discuss the Austin Healey Sprite and the MG Midget. Two different but similar cars sometimes referred to collectively as the Spridget.

  1. #1
    Freshman Member
    Join Date
    Mar 2011
    Location
    South Texas
    Posts
    22
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Electrical Troubleshooting Advice Needed

    '75 Midget 1500 Starts and runs fine but turn signals went out recently and checking found most everything, save headlights, was a no-go. Stoplights are on bright anytime battery is connected. Looked like a ground problem but main ground on firewall checked out. Battery at 12.7v but only 11.7 showing at fuse box.

    My eyes are really not up to reading that electrical diagram so I would appreciate any TS shortcuts you may have. Having this much stuff on the fritz simultaneously must mean something. Thanks in advance. Jim

  2. #2
    Yoda Jim_Gruber's Avatar
    Join Date
    Dec 2006
    Location
    Apollo Beach, FL
    Posts
    5,439
    Blog Entries
    2
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Electrical Troubleshooting Advice Needed

    You need to start by pulling apart every bullet connector and polish up with a Drexel Tool and wire Brush. Females side an 1/8” drill bit on low speed. Get both sides nice and shiny. Sane for fuse box. Clean the green off with wire brush and sandpaper. Same for every ground connector. Headlights ground IIRC to the bolt that Holds on the Heater Duct Tube. Clean up the ground strap where it attaches to the firewall. It needs to be shiny.

    When end I got my Sprite not a single lamp, headlight, not any Instruments worked. I went through over the course of a week and cleaned every single connection and got the green off. Every single item in the car worked when I was done. Clean the green off.
    Jim Gruber - Apollo Beach, FL
    Bugsy I - '68 Sprite w BE Bonnet - Gone but not forgotten
    Bugsy IV - '60 Bugeye - 1,275+.040 and a 5-Speed - CA Car - 2nd Owner from new - 10/12 Painting done, reassembly, cutting, and buffing in progress.

  3. #3
    Freshman Member
    Join Date
    Mar 2011
    Location
    South Texas
    Posts
    22
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Electrical Troubleshooting Advice Needed

    Quote Originally Posted by Jim_Gruber View Post
    You need to start by pulling apart every bullet connector and polish up with a Drexel Tool and wire Brush. Females side an 1/8 drill bit on low speed. Get both sides nice and shiny. Sane for fuse box. Clean the green off with wire brush and sandpaper. Same for every ground connector. Headlights ground IIRC to the bolt that Holds on the Heater Duct Tube. Clean up the ground strap where it attaches to the firewall. It needs to be shiny.

    When end I got my Sprite not a single lamp, headlight, not any Instruments worked. I went through over the course of a week and cleaned every single connection and got the green off. Every single item in the car worked when I was done. Clean the green off.
    Thank you for that response. Been there before for that drill; was hoping for a targeted quick fix, but alas... I have had good luck using a product called Deoxit spray on fussy connectors on aircraft; anybody here use it on those bullet connectors? I believe I will use it this time and hope for the best. Again, thanks.

  4. #4
    Yoda dklawson's Avatar
    Join Date
    Mar 2005
    Location
    Durham, North Carolina, USA
    Posts
    6,133
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    42
    Thanked in
    39 Posts

    Re: Electrical Troubleshooting Advice Needed

    That 11.7 at the fuse box is not a good sign and I agree with the others that you need to clean all the connections.

    I have used small wire "bottle brushes" on a cordless drill for the female connectors and ScotchBrite to clean the males. I use Vaseline or dielectric grease (depending which is at hand) to coat the parts prior to reassembly.

    As stated above, cleaning ALL the connectors makes a big difference. Be aware that the female connectors tend to fail inside the rubber sleeve so it is a good idea to buy new ones and simply swap them out. I get mine from britishwiring.com
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

  5. #5
    Luke Skywalker LarryK's Avatar
    Join Date
    Mar 2007
    Location
    Millstadt, IL
    Posts
    1,805
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    12
    Thanked in
    12 Posts

    Re: Electrical Troubleshooting Advice Needed

    Loosen all grounding bolts and retighten.
    Larry K
    58 Jag 3.4 MK 1 auto under restoration, 57 Jag 3.4 MK1 manual ,
    03 Cooper S, 2011 Cooper S Countryman, 2011 Land Rover LR4 HSE LUX, 1964 Valiant V200
    Also had , 68 Cortina 1600E, 64 Spit 4 & 80 1500, 73 GT6 3, 71 XJ6, 79 XJ6, 86 XJS V-12, 53 XK120 OTS.

  6. #6
    Obi Wan
    Join Date
    Aug 2013
    Location
    Damascus, MD
    Posts
    2,025
    Thanks Thanks Given 
    2
    Thanks Thanks Received 
    10
    Thanked in
    9 Posts

    Re: Electrical Troubleshooting Advice Needed

    Quote Originally Posted by N233TX View Post
    Thank you for that response. Been there before for that drill; was hoping for a targeted quick fix, but alas... I have had good luck using a product called Deoxit spray on fussy connectors on aircraft; anybody here use it on those bullet connectors? I believe I will use it this time and hope for the best. Again, thanks.
    Deoxit is good stuff. I've used it on all kinds of music and sound gear, and yes, I've used it on my Sprite. Depending on how much is on the connectors, you might be able to get away with hitting it with Deoxit if there's not much goop on the connectors, but failing that, the Dremel and wire brush will definitely work. My thought is, if you're going to be digging into the wires and pulling all the bullet connectors, take the few extra minutes per connection to clean them up properly with the dremel tool.

  7. #7
    Freshman Member
    Join Date
    Mar 2011
    Location
    South Texas
    Posts
    22
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Electrical Troubleshooting Advice Needed

    Mission accomplished. Three hours with test light, multimeter and Deoxit has all necessary functions operative. Bullet connectors were not too gooped up so the Deoxit did the trick. Had to sand tail light bulb contacts. Interestingly the always-on brake light was not a ground issue as I suspected but a broken return spring on the pedal. It let the pedal droop about 1/8" which was enough to activate the switch to the tail lights. Thanks to all for your helpful suggestions. Jim

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •